a ventilation system that must be ducted through the wall.
必须穿过墙壁管道通风系统。
a ventilation system that must be ducted through the wall.
必须穿过墙壁管道通风系统。
A test of arrosion performance of anticorrocive built-up weld layer in different meeiums was con-ducted by using a self-made arrosion testing machine.
用自制腐蚀磨机对耐蚀堆焊层在不同介中腐蚀磨性能进行了,结果表明:腐蚀介不同,堆焊层磨速率也不同。
In addition, the USAF continues to fund development work of the Aerojet (formerly Atlantic Research) Variable Flow Ducted Rocket ramjet system as a future propulsion option for an extended range AAM.
此外,美国空军继续投资于航空喷气研究所(原西洋研究所)可变喷流管火箭发动机系统,将其作为增程空空导弹未推进选项。
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